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FINANCIAL HIGHLIGHTS (Details) - $ / shares | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Per Share Operating Performance: |  |  |  |
Net asset value, beginning of year | $ 19.24 | $ 10.77 | $ 12.91 | $ 20.91
Total income (loss) | 1.47 | (0.04) | 7.88 | (10.12)
Total expenses | (0.05) | (0.03) | (0.13) | (0.09)
Net increase (decrease) in net asset value | 1.42 | (0.07) | 7.75 | (10.21)
Net asset value, end of year | $ 20.66 | $ 10.70 | $ 20.66 | $ 10.70
Total Return | 7.38% | (0.65%) | 60.03% | (48.83%)
Ratios to Average Net Assets |  |  |  |
Total income (loss) | 6.37% | (0.08%) | 49.79% | 20.96%
Management fees | 0.75% | 0.75% | 0.75% | 0.75%
Total expenses excluding management fees | 0.33% | 0.37% | 0.34% | 0.40%
Expenses waived | 0.00% | (0.22%) | (0.08%) | (0.25%)
Net expense excluding management fees | 0.33% | 0.15% | 0.26% | 0.15%
Net income (loss) | 6.10% | (0.31%) | 49.03% | 20.28%

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